Identify which of the following plants form strobili and which exhibit isometric growth, and define trophic hormones.

You're on a roll — Question 33: Strobili are reproductive structures found in certain non-flowering plants, particularly Lycophytes. i. Marchantia: A liverwort, does not form strobili. ii. Lycopodium: A clubmoss, forms strobili. iii. Funaria: A moss, does not form strobili. iv. Selaginella: A spike moss, forms strobili. The correct statements are ii and iv. Question 34: Isometric growth is a type of growth where all parts of an organism grow at the same relative rate, maintaining constant proportions. i. Organs appear to grow at the same rate as the rest of the body: This is characteristic of isometric growth. ii. It occurs in animals like fish and locust: These animals often exhibit periods of isometric growth. iii. The proportions of structure remain constant and changes in size is not accompanied by changes in shape or external form: This is the definition of isometric growth. iv. Organs grow at different rates from the entire body: This describes allometric growth, not isometric. The correct statements are i, ii, and iii. Question 35: Trophic hormones are hormones that stimulate other endocrine glands to produce and secrete their own hormones. i. Growth hormone and prolactin: Growth hormone has some trophic effects, but prolactin is not primarily a trophic hormone for other glands. ii. Prolactin and FSH: FSH is a trophic hormone, but prolactin is not. iii. LH, TSH, and ACTH: Luteinizing Hormone (LH), Thyroid-Stimulating Hormone (TSH), and Adrenocorticotropic Hormone (ACTH) are all classic examples of trophic hormones. iv. ACTH and Human placental lactogen: ACTH is a trophic hormone, but Human placental lactogen is not. The correct option is iii. Question 36: The heat loss center in the hypothalamus is activated when body temperature rises, promoting mechanisms to dissipate heat and reduce heat production. i. Increases vasoconstriction: This is a heat conservation* mechanism. ii. Inhibits sweating and panting: This would reduce heat loss; the heat loss center stimulates* these. iii. Increases thickness of air layer by contraction of hair muscles, making hair stand erect: This is a heat conservation* mechanism (piloerection). iv. Decreases metabolic activities: Reducing metabolic rate decreases internal heat production, aiding heat loss. The correct statement is iv. Got more? Send 'em!